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  <title>Checks if the storage contains a specific object</title>
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  <div id="layout-content"><div id="splobjectstorage.contains" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">SplObjectStorage::contains</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.1.0, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">SplObjectStorage::contains</span> &mdash; <span class="dc-title">Checks if the storage contains a specific object</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-splobjectstorage.contains-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>SplObjectStorage::contains</strong></span>(<span class="methodparam"><span class="type">object</span> <code class="parameter">$object</code></span>): <span class="type">bool</span></div>

  <p class="para rdfs-comment">
   Checks if the storage contains the <span class="type">object</span> provided.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-splobjectstorage.contains-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">object</code></dt>

     <dd>

      <p class="para">
       The <span class="type">object</span> to look for.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-splobjectstorage.contains-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns <strong><code>true</code></strong> if the <span class="type">object</span> is in the storage, <strong><code>false</code></strong> otherwise.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-splobjectstorage.contains-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3556">
    <p><strong>示例 #1 <span class="function"><strong>SplObjectStorage::contains()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$o1&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">StdClass</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$o2&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">StdClass</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$s&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">SplObjectStorage</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">$s</span><span style="color: #007700">[</span><span style="color: #0000BB">$o1</span><span style="color: #007700">]&nbsp;=&nbsp;</span><span style="color: #DD0000">"hello"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$s</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">contains</span><span style="color: #007700">(</span><span style="color: #0000BB">$o1</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$s</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">contains</span><span style="color: #007700">(</span><span style="color: #0000BB">$o2</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
bool(true)
bool(false)
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-splobjectstorage.contains-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="methodname"><a href="splobjectstorage.offsetexists.html" class="methodname" rel="rdfs-seeAlso">SplObjectStorage::offsetExists()</a> - Checks whether an object exists in the storage</span></li>
   </ul>
  </p>
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